Cheryl Campbell asks the composer about the creative process and what advice he may have for young composers.

List of works, discography, links to sheet music, and overview of Hagen's career.

Biography, list of works, current projects, contact information, and links from his management company.

Biography, picture, news, list of works, discography, and audio clips.

Official site. Includes events and news, audio samples, biography, discography, works list, articles, reviews, operas, gallery, links, message board, and contact information.

Study by Jane McCalla Redding dealing with the miniature folk opera Dear Youth (1990). Includes abstract and downloadable components in PDF format from the LSU Electronic Thesis and Dissertation Collection.

Pictures and recordings.

List of works.